Bigger or unusual job? Compare bids from local pros and you pick who does the work.
The service
What bathroom addition is, what a visit covers and where the line is.
The short answer
A bathroom addition creates a new bathroom where none exists: a half bath with a toilet and sink, a three-quarter bath with a shower, or a full bath with a tub. Bathroom Addition in San Jose is booked through pros who cover its 35 ZIP codes, in neighborhoods such as Willow Glen, Almaden Valley, and Cambrian Park. San Jose's dry summers are ideal for exterior painting and deck work — the fall calendar fills fast, so book early. Each pro sets their own price and warranty.
What a bathroom addition visit includes
What is included depends on the jobs you pick and on how each pro sets up their visit and timing. You see the exact scope with each pro's price before you book.
- Site visit and layout planning
- Framing and drain, vent and supply connections
- Electrical, lighting, exhaust fan and GFCI outlets
- Waterproofing, tile and fixture installation
- Vanity, toilet and shower or tub
- Permits, inspections and final cleanup
Pick what is on your list
Tick what you want done, or add your own. Your list goes under the booking card and to the pro you choose, and you can describe anything else when you book.
Planning
Tick what you want done. One visit can cover several.
Tick jobs above, or add your own. Your list goes under the booking card and to the pro you choose, so they see exactly what you need before they arrive.
What shapes a bathroom addition job
These are the things that make one job different from another. Mention them in your notes so each pro can scope your job properly.
What kind of bathroom to add
The type of bathroom and where it goes change the plumbing, the space and the permits. Ask bidders to price the version you prefer and one alternative. Tap an option to compare, then add your pick to your job notes.
What is not part of bathroom addition
Knowing where the line is keeps the visit on track and keeps you safe. When a job belongs to a specialist, NorTech tells you before you book.
- Any job where labor and materials together reach $1,000 or more is done by a licensed contractor. A new bathroom is above that, and every bidder on NorTech holds the required license.
- Replacing the main sewer line, or a septic system, if the existing system cannot handle the added bathroom. That is its own licensed project.
- Updating a bathroom that already exists. That is a bathroom remodel, which has its own service.
- Towels, accessories and decor unless the bid lists them.
- Removal of mold, asbestos or lead found when opening old walls, which is specialized work.
License and permits for bathroom addition
A new bathroom pulls together plumbing, electrical, framing and waterproofing. The contractor running it holds a general license, and licensed trades do the plumbing and wiring. The license shows on the pro profile.
New fixtures, drains, vents, circuits and a fan normally need a permit, with inspections of the rough plumbing and electrical and a final inspection. Local rules differ. Ask who files the permit and whether its fee is included in the bid.
Verify the license and insurance on the pro profile, and ask that the license number appear on the bid. When the work ends, ask for the permit and final inspection record and keep them with your home papers.
Plan your visit
How booking works, how to get ready, and what to expect where you live.
How booking bathroom addition works
Say what needs doing
Add your ZIP and a few words about the job.
Compare pros near you
Each pro sets their own price and warranty. NorTech does not pick for you.
Book the pro you pick
Add photos and details on their page. Your card is held and only charged after the work and the photos.
Photos and a warranty
Your pro backs the work with a workmanship warranty — if covered work is not right, your pro makes it right, free.
Before you book bathroom addition
Quick things that save a trip. Tick them off as you go; none of it is required to book.
Pick two or three possible locations
Mark spots near existing plumbing on a floor plan and rank them. Bidders can then compare drain paths, and you see how the choice changes the work.
Photograph the spaces above, below and beside
Take pictures of the room, the crawl space or basement below, the attic above and the nearest bathroom or kitchen. They show how plumbing and wiring can reach the new room.
Decide what fixtures you need
A half bath, a shower-only bath and a full bath with a tub are very different projects. Say who will use it and whether you want a tub, a walk-in shower or a double vanity.
Check the water heater and supply
Note the size and age of the water heater and the pressure at your taps. Bidders can tell you whether the system will keep up with another shower.
Plan for access to shutoffs
Know where the main water shutoff is and whether the house has a valve for each branch. A planned shutoff schedule avoids days without water.
Ask for the waterproofing method in writing
The bid should name the membrane or panel system, the corner and curb details, and any water test before tile. Ask to see the method in the bid before tile is ordered.
Say where in San Jose you are
Add your neighborhood, for example Willow Glen, Almaden Valley, and Cambrian Park, or your ZIP code to your notes. Pros choose the neighborhoods they cover, and it tells them how far they have to travel.
How where you live changes bathroom addition
Often booked together with bathroom addition
Book several services with one pro. Pros set their own bundle discounts.
A properly vented fan protects new finishes from moisture and is easiest to route before the ceiling closes.
Glass is measured after tile is set, so it is ordered near the end of the build.
Tile work and grout sealing are central to a new shower and bathroom floor.
Clearing and checking the main drain before adding fixtures avoids backups later.
Around San Jose
Where in San Jose the work happens, and the cities close by.
Bathroom Addition across San Jose
Pick your neighborhood to see what homes there tend to need. Pros choose the neighborhoods they cover, so enter your ZIP code to see who covers yours.
Willow Glen
1920s bungalows on tree-lined streets. Older wiring and original plaster are the usual surprises.
Find a pro in Willow GlenCities near San Jose
Pros often cover more than one city. The rings show 5 and 10 miles from the center of town.
Other services in San Jose
Each one has its own page for this city.
The catch-all for Willow Glen bungalows and Evergreen ranches — mounting, small repairs, and punch lists knocked out in one visit.
See pros in San JoseSan Jose homes run the full range of wall types — from downtown condo concrete to ranch-home drywall — and providers know how to mount cleanly on each.
See pros in San JoseSouth Bay summers run hot and dry — a ceiling fan is a real comfort upgrade in older San Jose homes without central air.
See pros in San JoseBright year-round sun fades interiors fast; low-VOC, UV-stable paint holds true color in South Bay light.
See pros in San JoseFrom nail holes to 12-inch patches, with texture matched across San Jose's mix of orange-peel and knockdown walls.
See pros in San JoseBuilder-grade fixtures in newer North San Jose builds, older shutoffs in Cambrian homes — both handled in one trip.
See pros in San JoseTrust and answers
What backs the work, who is licensed and insured, what customers say, and your questions.
Backed by your provider’s warranty. If covered work fails, your provider makes it right, free.
San Jose homeowners
Bathroom Addition reviews in San Jose
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Be the first bathroom addition review in San Jose
Your pro backs the work with a workmanship warranty — if covered work is not right, your pro makes it right, free. Book with confidence and tell San Jose how your pro did.
Book Bathroom Addition in San JoseFrequently asked